Coupling for pump-rods.



W. B. SCOTT.

GOUPLING FOR PUMP RODS.

MPL10 IIIIIIIIIII 01225 9.

gim. Patented o@t.4,1910.

WILLIAM n. scom'r, or Los Nannies CALIFORNIA.

conPLING non PUMP-Bons.

Specification of Letters Patent.

Application filed October 25, 1909. Serial No. 524,564.

To all whom'it may concern:

Be it known that I, WILLIAM B. Soo'rr, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Coupling for Pump-Rods,

. of which the following is a specification.

rlhis invention relates to couplings designed for coupling together pump rods used in oil wells, but which'may also be utilized for coupling other rods together, and one of themain objects of the present in'w'l'entionA is to provide an improved means for securspreading or splitting,

section through the coupling and adjacent ing the rod to thecoupling whereby the end of the rod is reinforced and strengthened at its inner end or vrim and prevented from and is also reinforced at the inner ends o the threads and prevented from bending or breaking at the inner end ofthe thread.

A further object is to provide a novel, eilicient and economical .means for preventing the rod from unscrewing from the couth these and other objects in view, the invention consists in the particular construction and combination of the parts, as hereinafter described..

Referring to the drawings: Figure 1 is a side elevation of the coupling with the rods screwed thereto. Fig. 2 is la longitudinal portions of the rod. Fig, 3 is a cross sectlon on line ws-s Fig. 2. v

The couplin comprises a female threaded member 1 an' a male member 2 which is screwed thereto, the member 2 having a flange 3 which abuts against the end of the member 1. Each member of the coupling at its outer end has a pin 4 which is ex-` ternally threaded for a portion of its len h, theoutermost portion 5 being unthrea ed. Each member also has a lian e 6 at an intermediate point at the termination of the threaded portion 4 and each dan e 6 is formed with an annular groove 7 w ich receives the inner end of the pump rod 8 which closely lits therein and is screwed on the threads 4: which are preferably tapered, the blank portion 5 of the pin closely fitting the bore of the rod 8 and strengthening thel Patented oct. a, 1910.

rod at the outer threads, so that the outer thread does not carry the bending strain of the rod and thus the rod is revented from bending or breaking at this point, which otherwise it is very apt to do. Theflange 6 is also rovided with a plurality of holes 9, prefera ly three in number and the inner Wall of the groove 7 is provided with a corresponding number of shallow depressions .10 which may be formed by the cutting end of the drill in boring the holes 9. The Wall of the rod 8 is indented as at -11 after the rod has been inserted in the annular groove 7, so that the indentations-l 11 project intothe depressions 10, which indentation is performed by a suitable punch inserted through the holes 9. After the rod 8 has been in- ,dented in this manner it is securelylocked to the depressions 10 and prevented from unscrewing. Should it` be desired to remove the rod, it may be done by insertin va drill through the holes 9v and drillin through the indented Wall of the rod Whic will then permit the rod to be withdrawn.

What .I claim is: Y

1. A coupling for pum rods oomprisin two members, each of whlch has a thread pinscrewed into the pump rod, a iiange on the member at the base of the pin, said flange having an annular groove which receives the end of the pump rod, the inner wall of the groove having depressions, the wall ofl the rod being indented to engage said depressions, the flange having holes for the insertion of a punch to produce said indentaions. 1 f

2. coup in or um ro com rising two members, Ich otpwhiizhA has a thi'eaded pin screwed into the ump rod, va flange on the member at the ase of the pin, said flange having an annular groove which receives the end of the`pump rod, the inner wall of the groove having depressions, the wall of the rod bein indented to engage said depressions, the ange having holes for the insertion of a punch to produce said indentations, the end of the pin being blank and closely fitting the bore of the rod to relieve the threads from strain.

g v l 971,794

3. A member having an annular ooved In testimoniowhereof, I have hereunto Ysei;

ange and depressions with a/threa ed pin my hand at s Angeles, California, this pro]ecting beond the flange, a rod screwed 18th'day of October, 1909.

on the threa ed pin with lts end extendin W. B. SCOTT. Y 5 into the grooved ange', and provlded w1 In presence. of-

indentations in its wall engaging said dee G. T. HACKLEY,

pressions. FRANK L. A. GRAHAM. 

